JP4865285B2 - Crusher installation method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mill which is simple in installation and short in installation period, and its installation method. <P>SOLUTION: A crusher body 10 for crushing raw materials, a reduction gear 8 for reducing the rotational speed of the crusher body 10, and a plurality of crushers 2 having a lower housing 9 for storing the reduction gear 8 are juxtaposed and installed. An installation method of the crushers 2 comprises a step of installing rails 26 over an area for juxtaposing the crushers 2 of a floor on which the plurality of crushers 2 are installed, a step of assembling the reduction gear 8, the lower housing 9, and the crusher body 14 on a reduction gear integrated base 33 outside the floor, and a step of conveying the assembled crushers 2 one by one on the rails 26 by a truck 25, and installing them, and leaving the rails 26 behind on the floor. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

The present invention relates to a pulverizer (hereinafter referred to as a mill) such as a pulverized coal machine of a coal-fired boiler facility, and more particularly to a mill installation method.

The arrangement of the mill and the mill building is generally as shown in FIG. 9 and FIG. In FIG. 1, 1 is a coal fired boiler, 2 (2a to 2f) are a plurality of mills for supplying pulverized coal generated by being connected to the coal fired boiler 1, next to the coal fired boiler 1 as shown in FIG. They are arranged in a row. 3 is a coal bunker provided at the top of each mill 2, 4 is a boiler building that houses a coal fired boiler 1, 5 is a mill building that houses the mill 2 and the coal bunker 3, and 6 is a turbine (not shown). This turbine building is generally arranged as shown in the figure.

  FIG. 11 is an exploded view showing a rough structural block of the mill 2. As shown in the figure, 7 is a base plate, 8 is a speed reducer, 9 is a lower housing, 10 is a mill body having a crushing table 11 and a plurality of crushing rollers 12 that roll on it, 13 is an intermediate housing, and 14 is A classifier body having a recovery cone 15, a fixed classifier 16, a rotary classifier 17, a coal supply pipe 18, and the like. By assembling these blocks in sequence, one mill 2 is completed.

  As shown in the figure, the mill 2 is delivered divided into blocks such as a base plate 7, a speed reducer 8, a lower housing 9, a mill body 10, an intermediate housing 13, and a classifier body 14.

Conventionally, the following two construction methods are known as installation methods for mills.
(1) Prior mill assembly method before installation of mill building steel frame a. After the foundation work of the mill is completed, the mill that was split and delivered locally is assembled using a mobile crane.

b. The boiler building steel frame should be installed in parallel with the mill installation work or after completion.

c. After the mill installation work is completed, the mill building will be installed.

(2) Post-mill assembly method using monorail after installation of mill building steel frame a. Install the mill building steel frame.

b. A hoist is installed on the monorail that is installed on the steel frame of the mill building .

 c. Using a hoist, assemble each block of the mill delivered separately.

In addition, regarding the assembly method of a mill, the following patent document 1 etc. can be mentioned, for example.
JP 2002-85993 A

As shown in FIGS. 9 and 10, the steel frame of the mill building 5 is a part of the steel frame of the boiler building 4, and the turbine building 6 is adjacent thereto. For this reason, the steel frame construction of the mill building 5 is a critical path in the process of installing the boiler body, the upper coal bunker 3 and the turbine building 6. The installation period of the mill 2 is generally scheduled to be about 1 month / unit.

In the conventional method (1) described above, delaying the entire steel construction of the mill building makes it difficult to adopt it for work in a short construction period because the whole construction work period is long. In addition, there are many problems that the mill is not made in time from the contract to the start of construction.

In the conventional method (2), since the mill building blocks are temporarily placed in a confined space in the mill building , the assembly work is performed using a hoist with a fixed movement range. Takes a lot of work.

An object of the present invention is to provide a mill installation method that eliminates the drawbacks of the prior art and can be easily installed and requires a shorter installation period.

In order to achieve the above object, the first means of the present invention includes a pulverizer body for pulverizing a raw material such as coal, a speed reducer for reducing the rotational speed of the pulverizer body, and a lower part for housing the speed reducer. In the installation method of the pulverizer in which a plurality of pulverizers having at least a housing are installed side by side,
Laying rails over an area where the plurality of pulverizers are arranged side by side on the floor where the plurality of pulverizers are installed;
A step of integrally assembling the speed reducer, the lower housing and the grinder main body on the lower housing / speed reducer integrated base outside the floor;
Each of the assembled pulverizers is transported on the rails to a predetermined installation position by means of a carriage, and the pulverization is performed on the floor including the rails while the rails are left at the laying position of the floor. And a step of installing the machine.

According to a second means of the present invention, in the first means, a guide member is detachably installed on the upper surface of the rail along the longitudinal direction of the rail, and when the crusher is conveyed to an installation position, the guide member is moved to the rail. It is characterized by being removed from.

According to a third means of the present invention, in the first means, a monorail in which a hoist is suspended on the ceiling side of a mill building that houses the plurality of pulverizers,
A wire is hung from the hoist to the pulverizer on the rail, and the hoist is moved together with the pulverizer to prevent the pulverizer from overturning during conveyance.

In the invention described in claim 1, since the assembling work of the pulverizer is performed outside the floor, that is, outdoors, in a wide place, the work efficiency is high and the man-hour can be reduced. Moreover, since the assembled pulverizer can be transported to the installation position using rails, the pulverizer is easily and safely transported within the floor. Furthermore, since the grinder is installed on the rail while leaving the rail in the position where the floor is laid, it is not necessary to remove the rail. For this reason, it is possible to shorten the installation work period.

According to the second aspect of the present invention, since the guide member is removed from the rail when the crusher is conveyed to the installation position, the floor can be formed in a flat without the guide member, which is safe in terms of work.

In the invention according to claim 3 , since the wire is hung from the hoist to the pulverizer mounted on the rail, and the hoist is moved together with the pulverizer, the rollover of the pulverizer during transportation is prevented. Safety can be achieved.

    Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a schematic plan view for explaining a mill installation method according to the embodiment.

The steel frame of the mill building 5 is installed in advance so as not to affect the entire process. In addition, the area 22 in the mill building 5 shown in FIG. 1 is the final assembly location of the mill set at a location that has relatively little influence on the entire process, and the steel frame in the area 22 is after all the installation of the mill 2 has been completed. It is attached. In the present embodiment, an area 22 is provided at one end in the mill building 5.

  A ground yard 23 is provided at a position close to the area 22, and the mill 2 is roughly assembled using a mobile crane 24 or the like in this large outdoor ground yard 23.

  As shown in FIG. 1, a plurality of rails 26 (three in the present embodiment) made of H-shaped steel for taking in are drawn in parallel from the area 22 to the deepest installation position of the mill 2. The rail 26 is laid so that the upper surface thereof is at the same level as the floor level 27 (see FIG. 4) of the concrete floor 21 to be formed later.

  As shown in FIGS. 2 and 3, a guide angle 28 made of L-shaped steel is placed on both sides of the upper surface of the rail 26 along the longitudinal direction of the rail 26, and an angle stop bolt 29 and a built-in nut 30 are mounted. Is detachably fixed to the rail 26.

  As shown in FIG. 3, a recess 31 that can accommodate the head of the angle stop bolt 29 is formed in advance at a position where the angle stop bolt 29 of the rail 26 is attached. Reference numeral 32 in the figure denotes a plastic nut cap for preventing the mixing of concrete.

  As described above, the block assembly of the mill 2 is performed at the assembly site 23. At this time, as shown in FIG. 5, the speed reducer base 34 and the lower housing base 35 are provided on the base plate 33 with the lower housing / reducer integrated. The speed reducer 8 and the lower housing 9 are assembled together through the integrated base plate 33 (see FIG. 6).

  FIG. 7 is a view showing an installation state of a conventional speed reducer base 34 and a lower housing base 35. The speed reducer base 34 and the lower housing base 35 are separate bodies and are installed separately. In the case of the present invention, since the speed reducer 8 and the lower housing 9 are assembled on the integrated base plate 33 as described above, the area of the integrated base plate 33 is designed to be larger than the area of the conventional base plate 7 (see FIG. 11). Yes.

  As shown in FIG. 5, a plurality of jack support portions 36 project from the outer peripheral portion of the integrated base plate 33. Reference numeral 37 in the figure denotes a reduction gear motor base.

  In the assembly site 23, blocks (see FIG. 11) such as the speed reducer 8, the lower housing 9, the mill body 10, the intermediate housing 13, and the classifier body 14 are sequentially assembled on the integrated base plate 33. When the block assembly of the mill 2 is completed, a plurality of endless track type transport carts 25 (see FIG. 3) are attached to the front, rear, left and right of the lower surface of the integrated base plate 33.

  These are moved from the building site 23 onto the rail 26 in the area 22 using the mobile crane 24 shown in FIG. By this movement, each transport carriage 25 is inserted between the two guide angles 28 and 28 as shown in FIG. The final assembly of the mill 2 is performed at this position (area 22).

  When the final assembly is completed, the mill 2 is conveyed along the rail 2 to a predetermined installation position. FIG. 8 is a diagram showing a conveying state of the mill 2, and a pulling wire 42 is connected to the mill 2, and it is laterally pulled by the winch 38 and conveyed to the installation position. The movement of the carriage 25 is guided by the guide angles 28 and 28 so that the carriage 25 is not detached from the rail 26.

As shown in the figure, a monorail 39 for maintenance is preliminarily installed on the ceiling of the mill building 5, and a plurality of hoists 40 are suspended on the monorail 39. A wire 41 is hung on the upper part, and the hoist 40 is moved together with the mill 2 to prevent the mill 2 from overturning during conveyance.

  When the mill 2 is conveyed to the installation position in this way, the jack 2 (see FIG. 1) is used to support the mill 2 using the jack support portion 36 (see FIG. 5) of the base 33 integrated with the lower housing / reduction gear. Jack up to the specified position.

  In this state, the guide angle 28 installed between the installation position of the mill 2 and the subsequent installation position of the mill 2 is removed from the rail 26, and the head of the angle fixing bolt 29 is recessed as shown in FIG. It is dropped into 31 and tightened with a built-in nut 30 to fix the head of the angle stop bolt 29 at a position where it does not protrude from the upper surface of the rail 26.

  Then, the concrete floor 21 is driven into a flat floor in which the floor level 27 and the upper surface of the rail 26 are at the same level. Then, the mill 2 is lowered with the jack 20 to complete the installation.

  FIG. 1 shows that the first mill 2a and the second mill 2b have been installed, the third mill 2c is being installed, the fourth mill 2d is in the area 22 during final assembly, A state in which the sixth mill 2e and the sixth mill 2f are being assembled at the ground assembly 23 is shown.

  As described above, each of the mills 2 is assembled and installed in sequence, and the plurality of mills 2a to 2f are finally arranged in a row as shown in FIG. Installed. The final mill 2f is installed at the place without being transported after the final assembly in the area 22 is completed.

When the installation of all the mills 2 is completed in this way, the remaining steel frame at the area 22 is assembled and the mill building 5 is completed.

  In the above-described embodiment, the case of a coal fired boiler facility has been described. However, the present invention is not limited to this, and can be applied to other technical fields using a mill such as a cement manufacturing facility.

It is a schematic plan view for demonstrating the installation method of the mill which concerns on embodiment of this invention. It is a partial perspective view of the rail used for the installation of the mill, and a guide angle. It is a partially expanded sectional view which shows the state at the time of conveying a mill using the rail. It is a partially expanded sectional view which shows the stationary state of the rail after conveying a mill. It is a top view which shows the state which installed the lower housing foundation and the reduction gear base on the lower housing and reduction gear integrated type base which concerns on embodiment of this invention. It is a front view which shows the state which installed the lower housing and the reduction gear on the lower housing and reduction gear integrated type base. It is a top view which shows the state which installed the conventional lower housing foundation and the reduction gear foundation. It is a schematic front view for demonstrating the conveyance state of the mill which concerns on embodiment of this invention. It is a schematic front view which shows arrangement | positioning states, such as a mill and a mill building . It is a schematic plan view which shows arrangement | positioning states, such as a mill and a mill building . It is an exploded view of the conventional mill.

Explanation of symbols

1: Coal fired boiler, 2, 2a to 2f: Mill, 3: Coal bunker, 4: Boiler building , 5: Mill building , 6: Turbine building , 8: Reducer, 9: Lower housing, 10: Mill body, 11 : Rotating table, 12: grinding roller, 13: intermediate housing, 14: classifier body, 15: collection cone, 16: fixed classifier, 17: rotating classifier, 18: coal supply pipe, 19: mill building steel frame, 20 : Jack, 21: Concrete floor, 22: Area, 23: Ground assembly, 24: Mobile crane, 25: Carriage for transportation, 26: Rail, 27: Floor level, 28: Guide angle, 29: Angle set bolt , 30: Built-in nut, 31: Recess, 32: Nut cap, 33: Lower housing / reduction gear integrated base, 34: Reduction gear foundation, 35: Lower housing foundation, 36: Jack support 37: reduction gear motor basis, 38: winches, 39: monorail, 40: hoist 41: wire, 42: towing wire.

Claims (3)

In the pulverizer installation method in which a plurality of pulverizers are arranged side by side, including a pulverizer body that pulverizes the raw material, a speed reducer that reduces the rotational speed of the pulverizer body, and a lower housing that houses the speed reducer ,
Laying rails over an area where the plurality of pulverizers are arranged side by side on the floor where the plurality of pulverizers are installed;
A step of integrally assembling the speed reducer, the lower housing and the grinder main body on the lower housing / speed reducer integrated base outside the floor;
Each of the assembled pulverizers is transported on the rails to a predetermined installation position by means of a carriage, and the pulverization is performed on the floor including the rails while the rails are left at the laying position of the floor. The process of installing the machine
Installation construction method of the crusher, characterized in that it comprises a. In the crusher installation method according to claim 1,
An installation method for a pulverizer , wherein a guide member is detachably installed on the upper surface of the rail along the longitudinal direction of the rail, and the guide member is removed from the rail when the pulverizer is transported to an installation position . In the crusher installation method according to claim 1 ,
A monorail with a hoist suspended on the ceiling side of the mill building that houses the plurality of crushers,
An installation method for a pulverizer , wherein a wire is hung from the hoist on the pulverizer mounted on the rail, and the hoist is moved together with the pulverizer to prevent the pulverizer from overturning during conveyance .

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